S
M
T
W
T
F
S
30
77°
55°
31
80°
55°
1
80°
56°
2
79°
55°
3
80°
47°
4
78°
45°
5
71°
49°
6
72°
53°
7
76°
53°
8
77°
54°
9
78°
53°
10
77°
52°
11
76°
49°
12
77°
51°
13
76°
53°
14
76°
53°
15
75°
52°
16
76°
44°
17
74°
51°
18
73°
49°
19
74°
46°
20
70°
42°
21
65°
39°
22
65°
46°
23
66°
44°
24
70°
40°
25
64°
39°
26
63°
38°
27
64°
45°
28
70°
46°
29
69°
41°
30
66°
40°
1
60°
43°
2
61°
36°
3
60°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Windsor
West Windsor's September 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 36° and 56°. The average high for September is 72° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in West Windsor. See also: October | November | December.
